With the file open in Pages, Numbers, or Keynote, select File and then Set Password to choose and apply your password.

If you have sensitive data you'd like to keep from prying eyes in a Microsoft Excel file, the easiest way to protect it is with Excel's built-in password tools.

Sending important documents? Learn how to password protect PDFs for extra security using easy steps with Adobe Acrobat and free online tools.

Encrypt and password-protect your database in Microsoft Access. Learn how to set a Password on an Access Database.

How to set up a passkey before Aug. 1 FILE – A Microsoft sign and logo are pictured at the company’s headquarters, Friday, April 4, 2025, in Redmond, Wash. (AP Photo/Jason Redmond, File) ...